This can be used to reduce closure size when a wrapper uses a custom
WINE at runtime, or a different wine in PATH.
See pkgs/tools/package-management/protontricks/default.nix
@the-kenny did a good job in the past and is set as maintainer in many package,
however since 2017-2018 he stopped contributing. To create less confusion
in pull requests when people try to request his feedback, I removed him as
maintainer from all packages.
In order to update wine packages more easily, the source derivations are
collected into a single sources.nix, so hashes can be updated like
`nix-prefetch-url pkgs/misc/emulators/wine/sources.nix -A stable`
